<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>06_相对定位</title>
    <style>
        .fu{
            background-color: #FF0;
        }
        .fu>div{
            width: 100px;
            height: 100px;
        }
        .z1{
            background-color: #F00;
        }
        .z2{
            background-color: #0F0;
            position: relative;
            top: 50px;
            right: 50px;
            /*z-index: -1;*/
        }
        .z3{
            background-color: #00F;
            position: relative;
            z-index: 1;
        }
    </style>
</head>
<body>
    <div class="fu">
        <div class="z1"></div>
        <div class="z2"></div>
        <div class="z3"></div>
    </div>
</body>
</html>